April 1999

April 1999

1999

Day		Moonage	Phenomenon (JST)
1	Thu	14.3	R-Oph is at maximum brightness (Mag:7.0-13.8,Period 306 days)
			03:53 Moon passes equator, to southern hemisphere
			07:49 Full Moon
			14:44 Mercury is at apogee(R.A.:23h25.8m)
			22:33 Algol is at minimum brightness
2	Fri	15.3	06:02 Jupiter is at conjunction(01o10'.8 south of Sun,Mag:-2.1,Dia.:33".1)
3	Sat	16.3	RT-Sgr is at maximum brightness (Mag:6.0-14.1,Period 306 days)
			17:05 Moon passes 03o12' north of Mars
4	Sun	17.3	19:23 Algol is at minimum brightness
5	Mon	18.3	07h Moon is farthest from the Earth 1.055(405,590km,Moonage 18.1,Dia.:29'.5)
			14:45 Longitude of the sun reaches 15 degrees
			21:04 Delta-Lib is at minimum brightness
6	Tue	19.3	20h Comet 105P/Singer Brewster (Period 6.44 years) passses perihelion
7	Wed	20.3	R-UMa is at maximum brightness (Mag:6.5-13.7,Period 301 days)
			T-UMa is at maximum brightness (Mag:6.6-13.5,Period 256 days)
8	Thu	21.3	04:56 Delta-Lib is at minimum brightness
			16:48 Moon is at south most(Decl.:-19o46'.4)
9	Fri	22.3	11:51 Last quarter moon
10	Sat	23.3	V-CrB is at maximum brightness (Mag:6.9-12.6,Period 357 days)
			17:50 Moon passes 01o08' north of Neptune(Occultation of Neptune in Norhtern Atlantic Ocean)
11	Sun	24.3	16:08 Moon passes 01o02' north of Uranus(Occultation of Uranus in Europe)
12	Mon	25.3	20:38 Delta-Lib is at minimum brightness
			21:21 Beta-Lyr is at minimum brightness
13	Tue	26.3	00:08 Venus closes to Eta Tau (Alcyone) (02o38'.6 in Tokyo)
14	Wed	27.3	13:07 Moon passes 01o05' south of Mercury(Occultation in Antarctic)
15	Thu	28.3	04:29 Delta-Lib is at minimum brightness
			10:13 Moon passes equator, to northern hemisphere
			17:20 Moon passes 03o13' south of Jupiter
16	Fri	29.3	13:22 New Moon
17	Sat	0.9	01h Mercury is at western greatest elongation(27o35'.0,Mag:0.4,Dia.:7".8)
			03:10 Moon passes 02o50' south of Saturn
			14h Moon is nearest to the Earth 0.934(358,900km,Moonage 1.1,Dia.:33'.3)
			20:07 Longitude of the sun reaches 27 degrees
18	Sun	1.9
19	Mon	2.9	05:40 Moon passes 06o39' south of Venus
			09:47 Occultation of Aldebaran(Mag:1.1) (time is in Tokyo)
			20:12 Delta-Lib is at minimum brightness
20	Tue	3.9	21:46 Longitude of the sun reaches 30 degrees
21	Wed	4.9	11:54 Moon is at north most(Decl.:+19o52'.2)
22	Thu	5.9	04:03 Delta-Lib is at minimum brightness
23	Fri	6.9	01h Lyr meteor shower is at peak( Apr.16-Apr.25)
			04:02 First quarter moon
24	Sat	7.9	21:07 Algol is at minimum brightness
25	Sun	8.9	06:41 Moon is closest to Regulus(00o14'.7 in Tokyo)
			11:05 Mars is at opposition(Mag:-1.7,Dia.:16".1)
			19:55 Beta-Lyr is at minimum brightness
26	Mon	9.9	18h Vir meteor shower is at peak(Mar.10-May 15)
			19:46 Delta-Lib is at minimum brightness
27	Tue	10.9	23h Comet P/1983 C1 ( Bowell-Skiff ) (Period 16.1 years) passses perihelion
28	Wed	11.9	10:18 Moon passes equator, to southern hemisphere
			17:22 Saturn is at conjunction(02o18'.5 south of Sun,Mag:0.3,Dia.:16".1, Ring:36".6 x 11".4)
29	Thu	12.9	National Holiday in Japan (Midori no hi)
			RS-Lib is at maximum brightness (Mag:7.0-13.0,Period 217 days)
			03:37 Delta-Lib is at minimum brightness
30	Fri	13.9	03:37 Neptune is most at west(Mag:7.9,Dia.:2".2)
			05:54 Moon passes 03o52' north of Mars
			23:55 Full Moon

Special Thanks to Shirakawa Astronomical Observatory